Improvement in street-lamps



E. BOESOH.

Street Lamp.

Patented Sept, 6,1 70,

than i (Mitts.

Letters Patent No. 106,990, dated September 6, 1870.

IMPROVEMENT IN STREET-LAMPS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, EMIL BOESOH, of the cityand county of San Francisco, State of California, have invented anImproved Lamp; and I do hereby declare the following description andaccompanying drawing are suiiicient to enable any person skilled in theart or science to which it most nearly appertains to make and use mysaid invention or improvements without further invention or experiment.

My invention relates more particularly to that class of lamps which isemployed upon the streets of cities to protect gaslights; and

lts object is to so construct the lamp as to obtain an increased volumeof light from the same burners as now used. This I accomplish by theapplication of improved reflectors, which are arranged so as to beadjusted to or from the light, and thus give it more -or less range, asdesired.

The draught is also provided for in an improved manner, so that theeiiiciencvof the light is also increased thereby.

My invention further relates to an improved method of retaining theglass sides of the lamp in place, so that they can readily removed whenitis desired either to clean or renew them. 7

in order to more fully illustrate and explain my invention, reference isbad to the accompanying drawing forming a part of this specification, inwhichlf'igure l is a side elevation of my lamp.

F1gure 2 is a view of a portion of one of the corner posts, showingtheir construction.

Figure 3 is a bottom'view. ot' the upper reflector.

Figure 4 shows the device for holding the glass in place.

Figure 5 is a view of the perforated reflector.

The general form of my lamp is similar to those ordinarily used, beinglargest near the .top and tapering toward the bottom.

The bottom of the lamp is left open, and a perforated reflector, A, isplaced inside the lamp, so that it shall rest upon the lower rim of thelamp. This re flector is formed with four sloping sides, twoot' whichare united at the top so as to form a ridge, similar to that iorLued bya hip-rooi'in architecture.

A long narrow slot, a, is left between these two sides, through whichthe gas, when turned on, can be lighted from below. This slot alsofurnishes air dircctly to the flame, and aids to increase the light, atthe same time causing it to burn steadily.

Asmall hole, b, is made at the middle of the slot 0, into which theupper end of the gas-burner enters. The perlorations 1n the reflectorallow a suflicicnt amount of the light to pass downward immediatelyaround the lamp-post, and also serve to provide fresh air to the tame.

The four standards (I of the lamp-frame are formed of two pieces ofsheet metal, bent and united as shown at fig. 2. This peculiar manner ofmaking the stand ards provides both the body of the standard and theside channels necessary for holding the glass sides in place.

A curvcd' root, B, is formed over the top of each glass side, whichgradually rises and tapers toward the center, leaving channelsf at thejunction line of each two oithc roofs.

'lhe chimney is made so that a section would give the form of aparallelogram. This chimney is placed through the opening in the top ofthe lamp, until its lower end is at the proper distance above the flame,when it is soldered or otherwise securedin place. Its upper end alsoextends a shortdistance above the roof of the lamp.

An outside chimney or protector, E, which is circular in form, is thenplaced over the chimney D, and

' secured to the ridges of the circular roofs, but leaving the channelsf communicating with its interior. The upper end of this outer chimneyis provided with cowls 1 1*", which protect the draught and prevent-dustand water from passing into the lamp.

The channels 1, which pass inside the outer chimney E, provide cool airbetween it and the inner chimney 1.), from whence it can pass throughtheopenings at the sides of the chimney 1) into the interior of thelamp, entering above the adjustable reflector G, and thus keeping itcool.

The reflector G is composed of as many faces as there are sides to thelamp. Tnis reflector is made of one sheet of metal, which may be stampedor otherwise formcd. An opening is left in its center, and a longflange, H, formed on its inner side, of a shape corresponding to thechimney 1), and is held by flat springs, It, which are secured to thechimney near the roof, and bear against it. The flange H slides underthese springs, and is held by them at whatever height it is desired toregulate it.

Small holes, 1', are made around the opening in the reflector, throughwhich the heated air from around the flame can pass in its passagethrough the top of the lamp.

The glass sides of the lamp, as above stated, are retainedin thechannels formed in the standards d.

In order to keep them steady, and prevent their being displaced by a jaror other accident, a small.

curved sheet-metal box, I, is secured to the lamp immediately over thecenter of each arch, in 'which the glass is to be placed. I

A slot, at, extends the entire length of the box in a positionconvenient to permit the upper edge of the glass to he slipped into it.

A spring, n, is placed inside this box, being bent so as to spring bothagainst the upper and lower sides of the box.

The upper edge of'the glass 0 is firstinserted in the slot in the box bycompressing the spring, when it can be readily placed in the groovesprepared for it, the spring holding it firmly in place. This .manner ofconstructing lampszwill readily recommend itself to person familiar withtheir requirements.

Besides the advantages above enumerated, the lightin and extinguishingof the lamp will be more readily acconi l shedlhan with those ordinarilyused. This will be apparent when it is seen that the cock which lets thegas on is below the lamp, and altogether outside of it, and after it hasbeen turned, by simply placing a lighted match or other flame inside theperfoated reflector A, the gas will be lighted.

The lampliglitercairbe provided with a lamp, which is provided with ahook, so that, by one movement, the gas can be turned on and the lamplighted simultaneonsly.

By adjusting the reflector G the light can be given a greater or lessrange, as' desired, and will be thrown out in every direction equally,while the provisions made for ventilation will prevent any part frombeing heated, or the flame from wavering or burning badly for want offresh air.

Having thus described my invention,

What I claim, and desire to secure by Letters Patent, is-

1. The perforated reflect-or A, constructed as described, and placed inthe bottom of a lamp, sub-- stantiall y as and for the purpose abovedescribed.

2. The standards (1, formed of two pieces of sheet metal, so as to leavethe grooves or channels for receiving the glass, snbstantially'as abovespecified.

3. The arched tapering roofs B over each side, so constructed as to formchannels f; substantially as and for the purpose described.

4. The adjustable reflector G, having as many concave faces as there aresides to the lamp, and provided with the flange or sleeve H, incombination with the springs 70, substantially as and for the purposeabove described.

5.' The box I, provided with the slot m and spring a, substantially asand for the purpose above described.

6. The above-described street-lamp, in which are combined the reflectorsA and G,-.chiinneys D and E, roof B, with its channels f, and the cowlsE and I all constructed and arranged snbstantiallyas specified.

In witness that the above-described invention is claimed by me, I havehereunto set my hand.

\Vitncsses: EMIL BOESOH.

.T. L. Boone, OHAnLEs BROWN.

